<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
	<title>Quantization</title>

	<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
	<link rel="icon" type="image/png" sizes="174x174" href="./favicon.png">

	<script src="https://cdnjs.cloudflare.com/ajax/libs/webcomponentsjs/2.4.3/webcomponents-bundle.js"></script>
	<link href="https://fonts.googleapis.com/css?family=Material+Icons&display=block" rel="stylesheet"/>
	<script src="../build/Tone.js"></script>
	<script src="./js/tone-ui.js"></script>
	<script src="./js/components.js"></script>
</head>
<body>
	<style>
		#buttons {
			display: flex;
			margin: 10px 0;
		}
		#buttons tone-button {
			flex-grow: 1;
			margin: 5px;
		}
		#progress {
			margin: 10px;
			color: #8c8c8c;
		}
	</style>
	<tone-example label="Quantization">
		<div slot="explanation">
			Using the "@" symbol, <a href="https://github.com/Tonejs/Tone.js/wiki/Time" target="_blank">Time</a> 
			expressions can be <a href="https://en.wikipedia.org/wiki/Quantization_(music)" target="_blank">quantized</a> 
			(aligned to a subdivision). In this example, a note's start time is aligned to the given subdivision. 
			<br><br>
			The Transport must be started
		</div>

		<div id="content">
			<div id="progress"></div>
			<tone-play-toggle></tone-play-toggle>
			<div id="buttons">
				<tone-button disabled id="at8n" label="@8n">@8n</tone-button>
				<tone-button disabled id="at4n" label="@4n">@4n</tone-button>
				<tone-button disabled id="at2n" label="@2n">@2n</tone-button>
				<tone-button disabled id="at1m" label="@1m">@1m</tone-button>
			</div>
		</div>
	</tone-example>

	<script type="text/javascript">
		const polySynth = new Tone.PolySynth(Tone.Synth).toDestination();

		function loop() {
			requestAnimationFrame(loop);
			// @ts-ignore
			const [bar, beat, sixteenth] = Tone.Transport.position.split(":");
			document.querySelector("#progress").textContent = `
				bar: ${bar}, beat: ${beat}, sixteenth: ${sixteenth}
			`;
		}
		loop();

		// bind the interface
		document.querySelector("tone-play-toggle").addEventListener("start", e => {
			Tone.Transport.start();
			// enable all of the buttons if it's playing
			// @ts-ignore		
			Array.from(document.querySelectorAll("tone-button")).forEach(el => el.disabled = false);
		});
		document.querySelector("tone-play-toggle").addEventListener("stop", () => {
			Tone.Transport.stop();
			// disable all of the buttons if it's not playing
			// @ts-ignore		
			Array.from(document.querySelectorAll("tone-button")).forEach(el => el.disabled = true);
		});
		document.querySelector("#at8n").addEventListener("click", e => {
			polySynth.triggerAttackRelease("B4", "8n", "@8n");
		});
		document.querySelector("#at4n").addEventListener("click", e => {
			polySynth.triggerAttackRelease("E4", "8n", "@4n");
		});
		document.querySelector("#at2n").addEventListener("click", e => {
			polySynth.triggerAttackRelease("G3", "8n", "@2n");
		});
		document.querySelector("#at1m").addEventListener("click", e => {
			polySynth.triggerAttackRelease("C2", "8n", "@1m");
		});
	</script>
</body>
</html>
